What is a year? It’s a question I get asked a fair amount around here… What’s a year? How many days until Saturday? How many minutes in an hour? How long until I can play games on your iPhone? But I digress… 

Minute Physics explains what a year is. And if you and your kid(s) want more calendar mathematics after that, then follow it up with this explanation about leap year!

via Gizmodo.

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